Answer:
It is supported by many different experiments.
Explanation:
Scientific theory is based on different experiments and tested in different situations and environment will all aspects. If the experiment finds true then observations will become theory. It can be changed in future if it does not meet the newly proposed conditions. But It does not means that, every theory can be changed.
therefore the frequency = 6×10^14
D will be the answer a program that allows you to take a tutorial on html terminology
2^(32-20) - one for the network number - one for the broadcast address = 4,094
